in reply to one line to check for common list values

There's a trick for jamming an expression into a string or regex:

my @result = "@input" =~  /@{[join "|", map "\\b$_\\b", @valuesToMatch]}/g;

But you're probably better off using a hash for this. It'll be much faster if the arrays are large.

my %match;
$match{$_} = 1 foreach @valuesToMatch;
my @result = grep $match{$_}, @input;

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In Section Seekers of Perl Wisdom